<template>
  <view class='sk-folding-cube' :style="userStyle">
    <view class='sk-cube sk-cube-1'></view>
    <view class='sk-cube sk-cube-2'></view>
    <view class='sk-cube sk-cube-4'></view>
    <view class='sk-cube sk-cube-3'></view>
  </view>
</template>

<script>
export default {
  props: {
    userStyle: {
      type: String,
      default: ""
    },
  },
}
</script>

<style scoped>
.sk-folding-cube {
  width: 100%;
  height: 100%;
  position: relative;
  margin: 3px auto;
  -webkit-transform: rotateZ(45deg);
  transform: rotateZ(45deg);
}

.sk-folding-cube .sk-cube {
  float: left;
  width: 50%;
  height: 50%;
  position: relative;
  -webkit-transform: scale(1.1);
  transform: scale(1.1);
}

.sk-folding-cube .sk-cube:before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: #888;
  -webkit-animation: sk-folding-cube-angle 2.4s infinite linear both;
  animation: sk-folding-cube-angle 2.4s infinite linear both;
  -webkit-transform-origin: 100% 100%;
  transform-origin: 100% 100%;
}

.sk-folding-cube .sk-cube-2 {
  -webkit-transform: scale(1.1) rotateZ(90deg);
  transform: scale(1.1) rotateZ(90deg);
}

.sk-folding-cube .sk-cube-3 {
  -webkit-transform: scale(1.1) rotateZ(180deg);
  transform: scale(1.1) rotateZ(180deg);
}

.sk-folding-cube .sk-cube-4 {
  -webkit-transform: scale(1.1) rotateZ(270deg);
  transform: scale(1.1) rotateZ(270deg);
}

.sk-folding-cube .sk-cube-2:before {
  -webkit-animation-delay: 0.3s;
  animation-delay: 0.3s;
}

.sk-folding-cube .sk-cube-3:before {
  -webkit-animation-delay: 0.6s;
  animation-delay: 0.6s;
}

.sk-folding-cube .sk-cube-4:before {
  -webkit-animation-delay: 0.9s;
  animation-delay: 0.9s;
}

@-webkit-keyframes sk-folding-cube-angle {
  0%, 10% {
    -webkit-transform: perspective(140px) rotateX(-180deg);
    transform: perspective(140px) rotateX(-180deg);
    opacity: 0;
  }
  25%, 75% {
    -webkit-transform: perspective(140px) rotateX(0deg);
    transform: perspective(140px) rotateX(0deg);
    opacity: 1;
  }
  90%, 100% {
    -webkit-transform: perspective(140px) rotateY(180deg);
    transform: perspective(140px) rotateY(180deg);
    opacity: 0;
  }
}

@keyframes sk-folding-cube-angle {
  0%, 10% {
    -webkit-transform: perspective(140px) rotateX(-180deg);
    transform: perspective(140px) rotateX(-180deg);
    opacity: 0;
  }
  25%, 75% {
    -webkit-transform: perspective(140px) rotateX(0deg);
    transform: perspective(140px) rotateX(0deg);
    opacity: 1;
  }
  90%, 100% {
    -webkit-transform: perspective(140px) rotateY(180deg);
    transform: perspective(140px) rotateY(180deg);
    opacity: 0;
  }
}
</style>